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v the followin ing had t erein to fingers upon a surface be taken may '7 after which 'up in a permanent Patented July 15 UNITED STATES AUBREY J. DBUIKOND, 01 NEW, YORK,

11'. Y., SYSTEHS, 1110., A CORPORATION ASBIGNOB T0 OF NEW YORK- mnon or rams rrnesarmrs.

Io Drawing.

To all whom it may concern:

Be it known that I, AUBREY J. Drum- MOND, a citizen of the United States, residing at New York city, in the county of ew York and State of New York, have invente certain new and useful Improvements in Methods of Taking Fingerprints, of which is a specification, reference bethe accompanying drawing.

My invention relates to taking impressions such palm prints, foot and toe prints, etc., an more particularly has reference to taking such impressions by substantially invisible and uno jectionable means.

For this purpose, instead of placing the which has previous y be placed upon improvements in as finger prints,

been inked, the fingers may 7 a surface which has been otherwise treate or re ared, after which the more or less invisib e impression may be develo ed with colored value for discernment an permanent record. To this end, I have foundtlrat by mixing a salt of silver, copper, mercury, bismu or oleate of lead with balsam of copaiba in the proportions of about one ounce of the former to 5; ounce of the latter, an excellent substitute for the unclean and obnoxious in can be had. This may be rolled upon a surface if desired much in the same manner that ink has heretofore been applied to the surface, and after this has been done, fingers of the erson whose impression is to placed thereon an may I then placed upon a card or other surface, the impression ing transmitted from the fingers to the card.

Asecond solution such as sulphide of ammonia or sodium sulphydrate or any soluble sulphide in the proportion of about one of the salt to about 100 of water, may be now applied by di ping or atomizing pre erably, or by came s hair brush, with result that the impression taken will be brought visible record suita le for filing.

Of course it will be understood that cards, sheets, or other suitable records may be prepared with suitable material, an the imression may made directly thereupon, the surface upon which the imression is made ma be suitably develope or otherwise treated Application flied Iebruary 24,

d the soiling of the hands and d embarrassing,

k as claimed.

the.

.to adhere to the part to be impressed, th

. pressing'said part thereupon, I a

n a receivmgsurface,

d to adhere y heat to render visual 152a. semi No. 588,028.

of making an original impression, then transferring it and developing it as stated.

t This method of registering fing r prints 1s not only convenient, economical and expeditious, but is particularly unobnoxious and desirable in commercial institutions such as banks and other ally where thefinger prints of ladies, tlemen, or children are to be recorded. of the drawbacks in more or less exclusive association with mat ters of criminal record, whereas it is believed thatwith a less objectionable method of registering finger prints, the value of such record in various commercial and social aspects will become more apparent, and less so that such records will be come more general with the result that the identity of persons meeting with sudden death, etc.,' will be more certain of identification. Y

Of course it will be understood that various modifications may be made'in the proportions and ingredients used and method of racticing departing rom th spirit of the invention Iclaim:

1: The method oftakingimpressions of the character described consistm in preparing a surface with materiad adapts en impressing said part thereupon, thereafter impressing said part upon a receiving surface, and thereafter treating said surface with a substantially colorless material to visualize to greater degree the record thereon.

2'. The method of taking impressions of the character described consisting in preparing a surface with material adapted to adhere to the part to be impressed, then imthereafter 1mpressing said part u and thereafter treating said receiving surface to chemically establish to greater dedegree the impression thereon.

3. The met 0d of taking impressions of the character described consistm in preparing asurfa'ce with materia adapted to the-partto be impre ,t en

impressing said part thereupon, thereafter institutions especb xumm mmrncarrcu the non-visual impression thus made instead m the the invention without first e'micaliy cheng-.

ing said part upon a receiving surface thereby transferring said material to and, iezwin she '& receiving surface, and thereafter chemically transferming said mea substantially permanent and is mere visual record in testimony whereof I hereunto afiix: my signemre AUBREY DEUMMQN 

